Operation
i
ndu
Q
®
- Series VMM
- 34 -
© SIKA
•
Ba_VMM_us
•
09/2018
Density:
If a mass unit in kg or t is used as flow unit,
the density of the medium must be entered
in [g/l]. The mass flow will be calculated
from the volume flow measurement using
the density.
After choosing the function
Density
and
pressing Enter, the current density value will
be displayed:
Example:
The density can be entered precise to 0.1 g/l.
Notice
The density is not measured. It is a pa-
rameter.
Volume flow LSL (read only):
This value represents the minimum lower
range value based on the inside diameter of
the sensor. This value is normally set for a
flow velocity of 0.82 ft/s (0.25 m/s).
Example:
Volume flow USL (information field):
This value represents the maximum upper
range value based on the inside diameter of
the sensor. This value is normally set for a
flow velocity of 36 ft/s (11 m/s).
Example:
7.1.6
Pulse output
The PULSE OUTPUT functional class in-
cludes the functions regarding the pulse
output.
The function
Pulse or frequency output
is used to define the mode for the digital out-
put – either pulses per flow unit or a fre-
quency 0 to 1 kHz corresponding to the
measuring range.
7.1.6.1
Frequency output
When selecting „frequency”, the maximum
frequency of 1 kHz will be output when the
upper-range value for mass or volume flow
QV URV is reached (depending on the select-
ed pulse unit). If the flow rate falls below the
volume flow limit MIN, the frequency is set to
0 Hz.
7.1.6.2
Pulse output
When selecting „pulses”, pulses per flow unit
will be output by the transmitter. The pulse
shape is defined by the parameters pulse
output unit, pulse value and pulse width.
Density
0998.2 g/l
QV LSL
+0330.000 USG/min
QV USL
+15764.0 USG/min
